"What they're really doing is they're giving you the right to work for less money," he said of the proposed legislation

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President Barack Obama gestures as he speaks to workers during a visit to the Daimler Detroit Diesel plant in Redford, Mich., Monday, Dec. 10, 2012. (AP Photo/Charles Dharapak)

President Barack Obama waded into Michigan's bitter fight over a likely new right-to-work law Monday while touting his fiscal cliff proposal, saying the proposed legislation would hurt auto workers.

"These so-called 'right-to-work' laws, they don't have to do with economics; they have everything to do with politics. What they're really doing is they're giving you the right to work for less money," he told a crowd of auto workers at an engine plant in Redford, Mich. The measure would prevent requiring non-union employees to financially support unions at their workplace.

Obama weighed in on the legislation, which Michigan's Republican Gov. Rick Snyder has promised to sign after the state's Republican-controlled Legislature approved it, while pressing for public support Monday to raise taxes on the wealthiest Americans. The comments came a day after he and House Speaker John Boehner met one-on-one for the first time to discuss ways to avert the "fiscal cliff."

Fiscal Cliff Talks Continue

As the year-end deadline draws near, President Obama and House Speaker John Boehner resume talks about the fiscal cliff.

(Published Monday, Dec. 10, 2012)

Neither side provided details of the weekend meeting at the White House. But with just three weeks until a flurry of tax hikes and spending cuts start taking effect, the mere fact that the meeting happened was seen as progress.

Negotiations continue to center on whether to raise tax rates for the top two percent of income earners. Obama, in his campaign-style speech, stressed that he won't sign a deal that doesn't include higher tax rates for the wealthiest Americans.

President Obama's Second Term

While Republicans have long opposed that approach, some GOP lawmakers are suggesting the party relent on taxes in order to win concessions from the president on entitlement reforms.

And business leaders, tired of Washington's partisan bickering creating uncertainty in the marketplace, are emphasizing the need to hammer out a deal before year's end.

"The millions of people that work for us, their lives are in flux. And this is incredibly critical we get this done now," said Jeffrey Immelt, GE's chief executive and head of the presidential advisory council on competitiveness.

GOP mavericks are putting increased pressure on their party's leaders to rethink how they approach negotiations with Obama in the wake of a bruising national election that left Democrats in charge of the White House and Senate.

"There is a growing group of folks looking at this and realizing that we don't have a lot of cards as it relates to the tax issue before year end," Sen. Bob Corker, R-Tenn., told "Fox News Sunday."

If Republicans agree to Obama's plan to increase rates on the top 2 percent of Americans, Corker added, "the focus then shifts to entitlements, and maybe it puts us in a place where we actually can do something that really saves the nation."

Conservative stalwart Sen. Tom Coburn of Oklahoma had already floated a similar idea. Rep. Tom Cole, R-Okla., has said Obama and Boehner could at least agree not to raise tax rates on the majority of Americans and negotiate the rates of top earners later.

"It's not waving a white flag to recognize political reality," Cole said on CNN's "State of the Union."

But such ideas face an uphill battle. Many House Republicans say they wouldn't vote for tax rate hikes under any circumstances. And GOP leadership could lose leverage in the negotiations if it raises the rate on upper-income earners without getting anything substantial in return like entitlement reform.

Democratic leaders have suggested they are unwilling to tackle entitlement spending in the three weeks left before the fiscal cliff is triggered.

"I just don't think we can do it in a matter of days here before the end of the year," Senate Democratic Whip Dick Durbin, D-Ill., said of Medicare reform specifically, in an interview Sunday on NBC's "Meet the Press."

"We need to address that in a thoughtful way through the committee structure after the first of the year," Durbin added.

The "fiscal cliff" refers to rate increases that would affect every worker who pays federal taxes, as well as spending cuts that would begin to bite defense and domestic programs alike. Economists say the combination carries the risk of a new recession, at a time the economy is still struggling to recover fully from the worst slowdown in decades.

The president's message in Michigan was that the economy is rebounding and Congress should not risk that progress to save tax cuts for the rich. The president used the Daimler Detroit Diesel plant where he spoke to illustrate his point, noting that the company plans to spend an additional $100 million to boost production in the U.S.

The president's re-election campaign also emailed supporters Monday, asking them to call their representatives and urge them to back Obama's fiscal cliff plan, even suggesting a script they could read. It's the latest example of the White House trying to put its massive voter database to use during the fiscal cliff negotiations in the same way it did during the presidential campaign.

Obama's plan would raise $1.6 trillion in revenue over 10 years, partly by letting decade-old tax cuts on the country's highest earners expire at the end of the year. He would continue those Bush-era tax cuts for everyone except individuals earning more than $200,000 and couples making more than $250,000. The highest rates on top-paid Americans would rise from 33 percent and 35 percent to 36 percent and 39.6 percent, respectively.

Boehner has offered $800 billion in new revenues to be raised by reducing or eliminating unspecified tax breaks on upper-income earners. The Republican plan also would cut spending by $1.4 trillion, including by trimming annual increases in Social Security payments and raising the eligibility age for Medicare from 65 to 67.